/**
* @@@ START COPYRIGHT @@@
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements.  See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership.  The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License.  You may obtain a copy of the License at
*
*   http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied.  See the License for the
* specific language governing permissions and limitations
* under the License.
*
* @@@ END COPYRIGHT @@@
**/

/*
 * Copyright 2010 The Apache Software Foundation
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.trafodion.wms.rest;

import java.io.IOException;

import javax.ws.rs.GET;
import javax.ws.rs.Produces;
import javax.ws.rs.core.CacheControl;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.ResponseBuilder;
import javax.ws.rs.core.UriInfo;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

//import org.apache.hadoop.hbase.ClusterStatus;
//import org.apache.hadoop.hbase.HServerLoad;
//import org.apache.hadoop.hbase.ServerName;

import org.trafodion.wms.rest.model.WorkloadListModel;

public class ServiceResource extends ResourceBase {
  private static final Log LOG =
    LogFactory.getLog(ServiceResource.class);
  
  static CacheControl cacheControl;
  static {
    cacheControl = new CacheControl();
    cacheControl.setNoCache(true);
    cacheControl.setNoTransform(false);
  }

  /**
   * Constructor
   * @throws IOException
   */
  public ServiceResource() throws IOException {
    super();
  }
 
  @GET
  @Produces({MIMETYPE_TEXT, MIMETYPE_XML, MIMETYPE_JSON})
  public Response get(final @Context UriInfo uriInfo) {
    if (LOG.isDebugEnabled()) {
      LOG.debug("GET " + uriInfo.getAbsolutePath());
    }
    //servlet.getMetrics().incrementRequests(1);
    try {
 //     ClusterStatus status = servlet.getAdmin().getClusterStatus();
     WorkloadListModel model = new WorkloadListModel();
//      model.setRegions(status.getRegionsCount());
//      model.setRequests(status.getRequestsCount());
//      model.setAverageLoad(status.getAverageLoad());
//      for (ServerName info: status.getServers()) {
//        HServerLoad load = status.getLoad(info);
 //       StorageClusterStatusModel.Node node =
//         model.addLiveNode(
//            info.getHostname() + ":" +
//            Integer.toString(info.getPort()),
//            info.getStartcode(), load.getUsedHeapMB(),
//            load.getMaxHeapMB());
//        node.setRequests(load.getNumberOfRequests());
 //       for (HServerLoad.RegionLoad region: load.getRegionsLoad().values()) {
 //         node.addRegion(region.getName(), region.getStores(),
//            region.getStorefiles(), region.getStorefileSizeMB(),
//            region.getMemStoreSizeMB(), region.getStorefileIndexSizeMB(),
//            region.getReadRequestsCount(), region.getWriteRequestsCount(),
//            region.getRootIndexSizeKB(), region.getTotalStaticIndexSizeKB(),
//            region.getTotalStaticBloomSizeKB(), region.getTotalCompactingKVs(),
//            region.getCurrentCompactedKVs());
//        }
//      }
//      for (ServerName name: status.getDeadServerNames()) {
//        model.addDeadNode(name.toString());
//      }
      ResponseBuilder response = Response.ok(model);
      response.cacheControl(cacheControl);
      //servlet.getMetrics().incrementSucessfulGetRequests(1);
      return response.build();
    } catch (Exception e) {
//      servlet.getMetrics().incrementFailedGetRequests(1);
      return Response.status(Response.Status.SERVICE_UNAVAILABLE)
        .type(MIMETYPE_TEXT).entity("Unavailable" + CRLF)
        .build();
    }
  }
}
